\newcounter{algorithmeligne}

\newenvironment{algorithme}
        {
        \setcounter{algorithmeligne}{0}

        \newcommand{\ITEM}{
                \stepcounter{algorithmeligne}
                {\footnotesize \arabic{algorithmeligne}.}\>
                }
        \newcommand{\lign}{\ITEM}
        \begin{center}
        \begin{tabular}{|c|}
        \hline
        \begin{minipage}{1cm}
%        \scriptsize
        \begin{tabbing}
\hskip1cm\=\qquad\=\qquad\=\qquad\=\qquad\=\qquad\=\qquad\=\qquad\=\qquad\=\qquad\=\qquad\=\qquad\\\kill 
        }
        {
        \end{tabbing}
        \end{minipage}
        \\\hline
        \end{tabular}
        \end{center}
        }
